Air-cooled cylinder



A ril 14, 1925..

- 1,533,810 c. s. RICKER AIR COOLED CYLINDER Fil ed Feb. 9, 1920 2Sheets-Sheet 1 Aprifi M, 11925..

' @312. s. RECKER AIR COOLED CYLINDER Filed Febo 9, 1920 2 Sheets-Sheet2 Patented Apr. 14;, 19,25.

UNITED; STATES CI-IESIER S. RICKEB, F INDIANAPOLIS, INDIANA.

AIR-COOLED CYLINDER.

Applicatinn filed February 9, 1920. Serial'No. 357,171.

To (HZ 1071 am it may concern:

Be it known that I, CHESTER S. RioKER,

' a. citizen of the United States, residing at air passagesIndianapolis, in the county of Marion and State of Indiana, haveinvented a new and useful Air-Cooled Cylinder, of which the following isa specification.

It is tlie'object of myinvention to cool internal combustion engines byair, by a construction. which is simple and inexpensive and anarrangement which provides an efiicieiit air movement.

The accompanying drawings illustrate my invention. Fig. 1 is a throughan engiiie'cylinder provided with my improved air cooling structure,being taken on the line 11 of Fig. 2; Fig. 2 is part elevation and partlongitudinal section on the line 22 of Fig; 1 of such engine cylinder;Fig. 3 is an end elevation, in partial section, of a fixed radial typeengine embodying my invention; and Fig. 1 is a bottom plan of the engineshown in Fig. 3, with the fan in section.

Referring first to Figs. 1 and 2, in which a single cylinder is shown,the cylinder 10 is of any desired type, with any suitable valvearrangement for its intake andexhaust. are embedded a plurality of thinmetal members 11, which are approximately L- sliaped in cross section,as is clear from Fig. 1. These members project radially from thecylinder, and the free end of the base of the L of each abuts againstthe heel of its neighbor. The members 11 form a complete circumferentialseries of longitudinal 12, each of which is formed by two adjacentL-shaped members, the base of one of such members, and the cylinder wallitself. This is a construction which is very easily manufactured, as thevLshaped members may be made of rolled sheet metal or of sheet-metalstainpings and can readily be firmly embedded in place in the outersurface. of the cylinder.

The passages 12 are opernat their ends, and air inay be caused to flowthrough them in various ways. A preferred arrangement for producing thisflow of air in radial type transverse. section In the outer surface ofthe cylinder engines is shown in Figs. 3 and 1. The several cylinders 10are arranged'radially around a common crank shaft 13, in the usualmanner of radial type engines, so that the passages 12 the completeengine. The outer ends of the passages 12 are 013911 130 the atmosphere.The inner ends of such passages 12 open into a chamber 14 surroundingthe crank case 15 in which the shaft 13 is located, which chamber 1 1 iscommon to the passages 12 of all the cylinders. This chamber 1 1 isclosed at one axial end, by an end wall 16, and at the other axial endopens into the central intake eye of a centrifugal fan 17 concentricwith the shaft 13, which shaft carries the blades of the fan.- As theshaft 13 rotates, the centrifugal fan throws air outwardly through theopenings 18 in its periphery, thus creating a suction which are radialwith respect to causes a continuous inflow of air through the passages12 into the chamber 1 1. -This produces a flow of air which effectivelycools the cylinders.

I claim as my invention:

1. A cylinder for internal combustion engines having continuouslongitudinal heat radiating fins, each fin having at its outer edge aflange extending to the next fin, such fins with their flanges forming aplurality of longitudinal air passages open at top and bottom forpermitting air to be passed lengthwise of the cylinder past the 'finswithin the casing formed by the fin-flanges. 2. A cylinder for internalcombustion en gines having continuous longitudinal heat radiating finsembedded in the cylinder wall, each fin having at its outer edge aflange extending to the next fin, such fins with their flanges forming aplurality of longitudinal air passages open at top and .bottom forpermitting air to be passed lengtlnvisc of the cylinder past the. finswithin the casing formed by the iii-flanges. In witness whereof, I havehereunto set my hand at Indianapolis, Indiana, this fifth day ofFebruary, A. I). one thousand nin hundred and twenty.

CHESTER S. RICKER.

